7 CONFIGURATION COMMAND Reference
96
<mode>
This parameter allows the user to select how the CT bus channels are
allocated. Usually (mode=1) the first timeslot connected to the CT bus is
connected to sc_channel and each subsequent timeslot that is selected is
connected to the next CT bus channel. This allows maximum utilization of
channels on the CT bus.
An alternative mode (mode=2) (only used if there is a specific requirement
for it) associates (but does not necessarily connect) timeslot 0 on the LIU
with sc_channel and subsequent timeslots on the LIU with subsequent CT bus
channels. Connections are only made when the corresponding bit in the
timeslot mask is set to 1. This mode of operation preserves the spacing
between timeslots that was originally found on the T1/E1 interface but does
result in a number of CT bus channels being not used.
The mode parameter is optional and may be omitted altogether. This has the
same effect as setting it to 1.
7.1.4
SCBUS_LISTEN Command
Syntax:
SCBUS_LISTEN <board_id> <liu_id> <timeslot>
<sc_channel>
Example: SCBUS_LISTEN 0 0 31 23
This command establishes a connection from the CT bus to an outgoing
timeslot on the Line Interface Unit (LIU).
Dynamic modification of voice paths can only be performed by issuing
messages directly to the board. The MVD_MSG_SC_LISTEN message is
recommended for this purpose.
<board_id>
The logical identity of the board in the range from 0 to one less than the
number of boards supported.
<liu_id>
The identifier of the T1/E1 Line Interface Unit in the range 0 to one less than
the number of LIUs fitted. This parameter can also be set to the special value
0x83 to select the signaling processor instead of an LIU. In this case timeslots
0 ... 3 correspond to signaling processor 0 ... 3 respectively.
Note that, for the SPCI2S, valid values for the LIU identifiers are 2 and 3.
<timeslot>
The timeslot number on the T1/E1 line interface unit on which the data from
the CT bus is transmitted. The valid range for timeslot is 1 to 31 for an E1
interface and 1 to 24 for a T1 interface.
<sc_channel>
The channel number on the CT bus to which the LIU listens. This must be in
the range from 0 up to one less than the total number of channels on the CT
bus.
